Don’t give up. This is very much a situation where you want to go on IRC and talk to @TPG about this. On IRC he is usually tpg or some variation of TPG. Also bero and crazy might be able to help you to find a way to get this to work. Or they could explain why it was important to remove that support.
Or tell if we can make a separate installer for this use case?
Ask Why this needed to be removed? Any consequences to bring it back?
We are a small group all volunteer, part-time, unpaid contributors and sometimes this has advantages. Granted there are disadvantages also.
If you have some skills you could end up working with them on these packages.
What you are doing may fit in with @bero’s effort to get well working real OpenMandriva Lx on low cost hardware with aarch64. Boxes for € 150 that willl actually function as a reasonably functional desktop or notebook.
It is late. Hope this makes sense and is helpful.
Did find the Videos. Whether I am smart enough to understand is the next test.